You may need to use the appropriate appendix table or technology to answer this question. In developing patient appointment schedules, a medical center wants to estimate the mean time that a staff member spends with each patient. Use a planning value for the population standard deviation of twelve minutes. (Round your answers up to the nearest integer.) How large a sample should be taken If the desired margin of error is three minutes at a 95% level of condence? How large a sample should be taken for a 99% level of condence? E